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arXiv 0811.0217nlin.PSnlin.CD
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激发系统中螺旋波的演化

Evolution of the Spiral Waves in Excitable System

Ji-Rong Ren, Tao Zhu, Shu-Fan Mo

摘要:

螺旋波广泛存在于各种二维可激发系统中,其旋转中心可视为点缺陷。本文利用\emph{Duan's topological current theory}得到了螺旋波的电荷密度及其拓扑荷的拓扑内部结构。从二维矢量场的拓扑性质出发,研究了螺旋波的演化。螺旋波在二维矢量场的极限点处产生或湮灭,在分岔点处相遇、分裂或合并。文中还讨论了该理论的一些应用。

英文摘要:

Spiral wave, whose rotation center can be regarded as a point defect, widely exists in various two dimensional excitable systems. In this paper, by making use of \emph{Duan's topological current theory}, we obtain the charge density of spiral waves and the topological inner structure of its topological charge. The evolution of spiral wave is also studied from the topological properties of a two-dimensional vector field. The spiral waves are found generating or annihilating at the limit points and encountering, splitting, or merging at the bifurcation points of the two-dimensional vector field. Some applications of our theory are also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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